Does anyone know what it might be? I bought a new batter/alternator, but with no luck. I had a friend help me and ran a wire from alteranter to battery with Does anyone know what it might be? I bought a new batter/alternator, but with no luck. I had a friend help me and ran a wire from alternator to battery with fuse. I thought that fixed it but NO. I used to have to at least turn it on everyday and it would be fine...well sort of. Now I can have it fully charged and as soon as I turn it off that’s it. Then I have to charge it again. I just went to auto zone and the check the voltage and it was reading 8.4...shouldn't it be 12v...was wanting to go to car show....boo. Any advice.